Fix pkg/glob tests on Windows.

pkg/glob/lib/src/utils.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library glob.utils;
 
 import 'package:path/path.dart' as p;
 
 /// A range from [min] to [max], inclusive.
 class Range {
@@ skipping 47 matching lines @@
 
 /// Returns [contents] with characters that are meaningful in regular
 /// expressions backslash-escaped.
 String regExpQuote(String contents) =>
     contents.replaceAllMapped(_quote, (char) => "\\${char[0]}");
 
 /// Returns [path] with all its separators replaced with forward slashes.
 ///
 /// This is useful when converting from Windows paths to globs.
 String separatorToForwardSlash(String path) {
-  if (p.context != p.Style.windows) return path;
+  if (p.style != p.Style.windows) return path;
   return path.replaceAll('\\', '/');
 }